Jon-Don Ultimate 340 User manual

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Owner’s Manual — Ultimate 340
Installation, Operation & Service Instructions
Read and Save These Instructions
The Ultimate 340 is one of the most effective and versatile drying devices available. The Ultimate 340
removes more water and has more grain depression than other refrigerant dehumidiers, even though it
only requires 10 amps of electricity.
The term LGR (Low Grain Refrigerant) was created to describe the unique drying capabilities of this
dehumidier. These units were known for delivering substantially drier air, as well as for drying areas to
much lower humidity levels than conventional dehumidiers.
The Ultimate 340 LGR,
High Capacity Dehumidifier
• Improved water removal
145 pints per day AHAM (80ºF, 60%)
• Improved grain depression
The driest air from an LGR
• MERV-11 ltration
• Multiple ducting options
12” intake, 10” lay-at exhaust
• Less than 10 amps
Removes the most pints of water per kilowatt
• Stainless steel cabinet
• Internal pump with 30 feet of hose
• Five-year warranty on the sealed refrigeration
system.
• 12” recessed wheels
• Solid state controls
Ultimate 340
# OE-ULT340-EA
Specifications subject to change without notice.
TS-620
04/12
The World Leader in Carpet Cleaning, Restoration and Janitorial Supplies 1.800.556-6366
Patent D570,988

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1 Specifications
Part No.
OE-ULT340-EA
Power 110-120 Vac, 10 amps
Water 145 pints/day @ AHAM (80°F, 60%)
Removal
Refrigerant 1 lbs. 10 oz R410a
Charge
Blower 340 CFM
Internal Condensate Pump with 20’ lift,
30’ vinyl hose
Operating 33°F to 105°F
Range
Filters 16” x 20” x 2” Pleated Media MERV-11
Duct Intake – 12” Flex-Duct
Options Exhaust – 10” Lay-Flat
Warranty Five years;
First year 100% of Parts and Labor
Second-fth year 100% of Parts of sealed
refrigeration system.
Dimensions
Width 20”, Height 40-1/4”, Depth 21-1/4”
Weight 130 lbs.
Patent D570,988
2 Operation
2.1 Transporting the Ultimate 340
The Ultimate 340 must always be upright when transported
by vehicle. It may be tipped on to its handle and back for
loading and moving by hand.
2.2 Location
Note the following precautions when locating the Ultimate
340:
• It is designed to be used INDOORS ONLY.
• If used in a wet area, plug it into a GROUND FAULT
INTERRUPTER.
• DO NOT use the Ultimate 340 as a bench or table.
• It must always be used in the upright position.
• The air inlet on top & the side outlet must be at least
1 foot from walls and other obstructions to air ow.
Read the operation and maintenance instructions
carefully before using this unit. Proper adherence to these
instructions is essential to obtain maximum benefit from
your Ultimate 340 dehumidifier.
Table of Contents
Introduction.............................................................................1
1. Specications ..................................................................2
2. Operation .........................................................................2
2.1 Transporting the Ultimate 340 ................................. 2
2.2 Location .....................................................................2
2.3 Electrical Requirements............................................ 3
2.4 Condensate Removal................................................ 3
2.5 Ducting....................................................................... 3
2.6 Power Switch .............................................................3
2.7 Pump Purge Switch...................................................3
2.8 Hour Meter.................................................................3
2.9 Defrost Control Adjustment ......................................3
2.10 Hours Button ...........................................................3
2.11 Defrost Light............................................................3
2.12 Low Pressure Control..............................................3
3. Maintenance.................................................................... 3
3.1 Air Filter ...................................................................... 3
3.2 Storage....................................................................... 4
4. Service.............................................................................. 4
4.1 Warranty..................................................................... 4
4.2 Technical Description................................................ 4
4.3 Troubleshooting......................................................... 4
4.4 Air Mover Replacement.............................................5
4.5 Thermistor Replacement ..........................................5
4.6 Condensate Pump Replacement ............................. 5
4.7 Refrigerant Charging.................................................6
4.8 Compressor/Capacitor Replacement ......................6
4.9 Gravity Drain Option.................................................. 6
4.10 Relay.........................................................................6
5. Wiring Diagram ...............................................................7
6. Service Parts List............................................................. 8
7. Warranty.........................................................................10
Serial No. ___________________________
Purchase Date ______/______/_____
Dealer’s Name ___________________________________

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2.3 Electrical Requirements
The Ultimate 340 plugs into a common grounded outlet on a
15 Amp circuit. It draws 10 Amps at 80°F, 60% RH. If used in
a wet area, a ground fault interrupter (GFI) is required.
If an extension cord is required, it must have a minimum of
14 gauge conductors if 25 feet long or less and 12 gauge
conductors if greater than 25 feet long.
2.4 Condensate Removal
The Ultimate 340 is equipped with an internal condensate
pump to remove the water that is condensed during
dehumidication. This allows the condensate to be pumped
30’ with the attached hose. If the condensate must be
pumped more than 20 feet above the unit, a second pump
must be added to relay the condensate. If the pump fails
and the unit must be used before it can be replaced, the
condensate can be drained by gravity (see Sec. 4.9).
2.5 Ducting
A detachable rectangular exhaust collar is supplied that will
allow 10” round lay-at duct to be attached to the Ultimate
340 outlet. Lay-at plastic ducting is available from Jon-Don.
To attach ducting to a collar, put the plastic duct end through
the collar center and roll the duct end outward so that it
overlaps the outside of the collar. The duct and collar may
then be quickly attached to the Ultimate 340 by snapping the
collar over the four screws at the blower outlet.
2.6 Power Button
Press the POWER button to turn the dehumidier on or off.
When starting the dehumidier the display will show the
accumulated hours. Press the POWER button again to turn
the dehumidier off. The display will also power off.
2.7 Pump Purge Button
During normal operation the pump automatically cycles every
four minutes. Press the PURGE button to remove condensate
manually from the reservoir. There are several ways to
manually remove water from the reservoir:
1. Press the PURGE button once and the pump will run for
20 seconds
2. Press and hold the PURGE button and the pump will run
for up to 30 seconds
3. Press the PURGE button while the dehumidier is
powered off and the pump will run for 30 seconds.
Always manually purge the water reservoir before transport
or storage. Turn off the power and allow the plugged in dehu-
midier to rest 15 minutes before the nal purge.
2.8 Hour Meter
The digital hour meter displays the cumulative and job time
the dehumidier has been turned on to the tenth of an hour.
The total and job hours measured are stored when the unit is
unplugged. The previous total will be displayed the next time
the unit is turned on. The job hours can be reset by pressing
and holding the HOURS button for 5 seconds when the unit is
operating.
2.9 Humidistat
Adjust the humidistat to the desired conditioned humidity.
The humidistat has a range of 20% to 70% RH. “ON” will
operate the unit continuously regardless of humidity.
2.10 HOURS Button
Press the HOURS button when the dehumidier cannot be
plugged in and the hour meter needs to be read. The digital
hour meter will display the last saved cumulative time for ten
seconds.
2.11 DEFROST Light
The DEFROST light turns on when the unit is in defrost cycle
and indicates when the compressor is off.
DRYING TIP: Air’s ability to absorb moisture from wet
surroundings and the Ultimate 340’s ability to remove
moisture from that air is greatly improved at higher
temperatures. We recommend that the area to be dried be
heated to over 70°F if possible. Less drying time will be
required and efficiency will improve.
2.12 Low Pressure Control
If the low side refrigerant pressure drops to 35 PSIG, the
low pressure control opens and shuts off the compressor
and blower. It is an automatically reset control. Its primary
function is to prevent damage to the compressor if a leak
develops in the refrigeration system. It may also open if
stored where it is below 40°F and then started. Under these
conditions, the unit will restart within several minutes; it may
cycle several times until the unit warms up.
3 Maintenance
3.1 Air Filter
The Ultimate 340 is equipped with a pleated fabric air lter
that must be checked regularly. The standard lter is a MERV-
11 high efciency lter. Operating the unit with a dirty lter
will reduce the dehumidier’s capacity and efciency and
may cause the compressor to cycle off and on unnecessarily
on the defrost control.
The lter can generally be vacuumed clean several times
before needing replacement. Replacement lters can be
ordered from Jon-Don; call 1-800-556-6366 or at jondon.
com. DO NOT operate the unit without the lter or with a
less effective lter as the heat exchange coils inside the unit
could become clogged and require disassembly to clean.

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3.2 Storage
There are two issues to consider when the Ultimate 340 is
stored between uses and both pertain to the water trapped
in the unit: damage caused by freezing or biological growth.
The effect of the trapped water can be greatly reduced if
precautions are taken to remove as much as possible before
storage.
1. Use the pump purge switch (see Sec. 2.7 & Fig. 4) to
reduce the water level in the reservoir.
2. Stretch the hose at to drain it completely. Raise one
end above your head and spool to drain water out of the
other end.
If the unit will not be exposed to freezing temperatures, an
alternative to reduce biological growth is to ush the unit
with a bio-fungicide that is approved for use with copper,
aluminum and polyethylene. To ush:
1. Run the hose to a drain.
2. Plug in the unit but do not turn it on.
3. Remove the air lter. Slowly pour a quart of the chemical
through the heat exchanger
4. Hold in the pump purge switch to reduce the water level
in the reservoir.
5. Flush with water.
4 Service
CAUTION: Servicing the Ultimate 340 with its high pressure
refrigerant system and high voltage circuitry presents a
health hazard which could result in death, serious bodily
injury, and/or property damage. Only qualified service
people should service this unit.
4.1 Warranty
A warranty certicate has been enclosed with this unit;
read it before any repair is initiated. If a warranty repair is
required, call Jon-Don at 1-800-556-6366 for warranty claim
authorization and technical assistance.
4.2 Technical Description
The Ultimate 340 uses a refrigeration system similar to an air
conditioner’s to remove heat and moisture from incoming air,
and to add heat to the air that is discharged (see Fig. 2).
Hot, high pressure refrigerant gas is routed from the
compressor to the condenser coil (see Figure 2). The
refrigerant is cooled and condensed by giving up its heat
to the air that is about to be discharged from the unit. The
refrigerant liquid then passes through a lter/drier and
capillary tubing which cause the refrigerant pressure and
temperature to drop. It next enters the evaporator coil where
it absorbs heat from the incoming air and evaporates.
The evaporator operates in a ooded condition, which means
that all the evaporator tubes contain liquid refrigerant during
normal operation. A ooded evaporator should maintain
constant pressure and temperature across the entire coil,
from inlet to outlet.
The mixture of gas and liquid refrigerant enter the
accumulator after leaving the evaporator coil. The
accumulator prevents any liquid refrigerant from reaching the
compressor. The compressor evacuates the cool refrigerant
gas from the accumulator and compresses it to a high
pressure and temperature to repeat the process.
4.3 Troubleshooting
No dehumidication, neither hour meter display nor
compressor run and POWER button does not turn ON.
1. Unit unplugged or no power to outlet
2. Defective control board
3. Loose connection in internal wiring
No dehumidication, neither hour meter display nor
compressor run with POWER button ON.
1. Defective control board
2. Loose connection in internal wiring
Figure 2: Refrigeration system

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Some dehumidication, air mover runs continuously but
compressor only runs sporadically.
1. Unit is in defrost cycle, DEFROST light on
2. Defrost thermistor defective or loose
3. Loose connection in compressor circuit
4. Defective compressor overload
5. Defective compressor
6. Defective relay
7. Upper housing is not sealed to lower housing
8. Check dehumidistat for proper setting
No dehumidication, air mover runs but compressor does
not.
1. Bad connection in compressor circuit
2. Safety oat switch closed, check pump reservoir
3. Defective compressor capacitor
4. Defective compressor overload
5. Defective compressor
6. Defective control board
Air mover does not run. Compressor runs briey but cycles
on and off.
1. Loose connection in blower circuit
2. Obstruction prevents impeller rotation
3. Defective air mover
Unit removes some water but not as much as expected.
1. Air temperature and/or humidity have dropped
2. Humidity meter and/or thermometer used are out of
calibration
3. Unit has entered defrost cycle
4. Air lter dirty
5. Defective defrost thermistor
6. Low refrigerant charge
7. Air leak such as loose front cover
8. Defective compressor
9. Restrictive exhaust or inlet ducting
Unit runs but does not pump water.
1. Hose kinked or plugged
2. Pump motor defective
3. Pump check valve plugged
4. Bad connection in pump circuit
5. Hose disconnected internally
6. Defective control board (pump phase)
Unit pumps water automatically but not when PURGE button
is pushed.
1. Bad connection in PURGE button circuit
2. Defective control board
Evaporator coil frosted continuously, low dehumidifying
capacity.
1. Defrost thermistor loose or defective
2. Low refrigerant charge
3. Dirty air lter or restricted air ow
4. Upper housing is not sealed to lower housing
Compressor runs with POWER button OFF.
1. Defective relay
2. Defective control board
3. Upper housing not sealed to tower
No hour meter display when the HOURS button is pressed.
1. Battery charge is low. Replace battery
2. Defective control board
4.4 Air Mover Replacement
The blower has a PSC motor and internal thermal overload
protection. If defective, the complete assembly must be
replaced.
1. Unplug power cord
2. Remove the front cover
3. Remove the four screws attaching the blower to the
mounting support
4. Disconnect the blower leads
5. Reassemble the new blower using the above procedure
in reverse
4.5 Thermistor Replacement
The defrost thermistor is attached to the refrigerant suction
line between the accumulator and the evaporator.
To replace thermistor:
1. Unplug the dehumidier
2. Remove the front cover
3. Remove aluminum tape
4. Remove control panel
5. Unthread thermistor from condenser grommet
6. Detach thermistor from control board jumper, J1
7. Reassemble thermistor and dehumidier using the above
procedure in reverse
4.6 Condensate Pump Replacement
The internal condensate pump removes water that collects in
the reservoir.
To replace the condensate pump:
1. Unplug the unit
2. Remove the front cover
3. Unplug the pump wires from the wire harness

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4. Remove the condensate hose and the one screw
attaching the pump bracket to the base
5. Replace the pump, hose, wiring, bolts, and cover in the
reverse order
4.7 Refrigerant Charging
If the refrigerant charge is lost due to service or a leak, a
new charge must be accurately weighed in. If any of the
old charge is left in the system, it must be removed before
weighing in the new charge. Refer to the unit nameplate for
the correct charge weight and refrigerant type.
4.8 Compressor/Capacitor Replacement
This compressor is equipped with a two terminal external
overload, run capacitor, but no start capacitor or relay (see
Fig. 3).
4.9 Gravity Drain Option
If the condensate pump fails and cannot be replaced
immediately, the Ultimate 340 can be used by draining by
gravity.
1. Unplug the unit and remove the front cover.
2. Push the plastic plug on the right side (see Fig. 4) out
from inside the unit.
3. Locate the heavy vinyl hose that connects the drain pan
to the condensate pump. Pull the end out of the pump.
4. Push that end of the vinyl hose through the hole in the
right side.
5. Connect a garden hose and run it to a drain. Keep the
hose as at to the oor as possible to avoid air pockets
that would hinder draining. Placing the unit on something
above the oor will also improve draining.
4.10 Relay
The contacts of the single pole, single throw relay complete
the power circuit to the compressor. The contacts are closed
when power is provided to the relay coil via the control circuit.
The control circuit includes the power switch, low pressure
control, defrost thermostat and timer.

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GRN
WHT-13
BLK-14
BLK-4
BLK
BRN
BLK-5
BLK-1
BLK-12
WHT-2
WHT-8
BLK-6
RED-13
YEL-7
WHT-9
WHT-7
YEL
BLU
GRY
WHT
RUN
CAPACITOR
COMPRESSOR
BLOWER
MOTOR
LEVEL
SWITCH
RUN
CAPACITOR
RELAY
LOW
PRESSURE
PUMP
FLOAT
SAFETY
NC
NO
THERMISTOR
PLUG
R
C
S
E5
E4
E1
E2
E3
6
0
4
1
WIRE
NUT
YEL
YEL
PART NO.
REV.
PH-4027288-EA
C
HUMIDISTAT
WHT-8
BLU
BLK-3
Figure 3: Electrical schematic of Ultimate 340
5 Wiring Diagram

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Item Part No. Qty. Description
1 PH-4027275-EA 1 Extension Cord, 20ft
2 PH-4027257-EA 1 Heat Exchanger
3 PH-4028225-EA 1 Evaporator
4 PH-4029176EA 1 Compressor
5 PH-1970010-EA 1 Relay
6 PH-4029606-EA 1 55 uFd Capacitor
7 PH-4033031-08-EA 1 20 uFd Capacitor
8 PH-4027272-EA 2 Feet
9 PH-4024078-EA 1 Duct Collar
10 PH-4027264-EA 1 Blower
11 PH-4029510-EA 1 Filter/Drier
12 PH-4022672-EA 3 Capillary Tubes
13 PH-4023649-EA 1 Condensate Pump
14 PH-4022254-EA 1 Accumulator
15 PH-4027278-EA 1 Thermistor
16 PH-4021475-EA 1 Filter, 2”x16”x20”
17 PH-4027259-EA 1 Top
18 PH-4027253-EA 1 Front
19 PH-4026304-EA 2 12” Wheel
Item Part No. Qty. Description
20 PH-4026311-EA 1 Axle
21 PH-1284404-EA 2 Cotter Pin
22 PH-4027273-EA 1 Skid Plate
23 PH-4023080-EA 1 Coupling Insert, .38 Tube
24 PH-4027258-EA 1 Plug Receptacle
25 PH-4027172-EA 1 Humidity Controller
26 PH-4021495-EA 1 Knob
27 PH-4026094-EA 1 Handle
28 PH-4027254-EA 1 Control
29 PH-1912500-EA 1 9V Battery
Items listed below are not shown
PH-4028237-EA 1 Condenser Coil
PH-4024910-EA 1 Coupling Body, .25 Tube
PH-4027277-EA 1 Coupling Insert, .25 tube
PH-4024916-EA 1 Drain Hose (.25 ID x 33’ long)
PH-1096008-EA 6 Front Panel Screw, 1/4-20 x 3/4
PH-1205473-EA 6 Front Panel Retaining Nut, 1/4 –20
6 Service Parts
Figure 4
Specifications subject to change without notice.
1
2
3
5, 6, 7
89
10
11, 12
13
14
15
16 17
18
19, 20, 21
22
23
24
27
28, 29
25, 26
4

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24

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Ultimate 340 Dehumidifier Limited Warranty
Warrantor:
Jon-Don
1-800-556-6366
Who Is Covered: This warranty extends only to the original end-user of the Ultimate 340 dehumidier, and
may not be assigned or transferred.
First Year Warranty: Jon-Don warrants that, for one (1) year the Ultimate 340 dehumidier will operate
free from any defects in materials and workmanship, or Jon-Don will, at its option, repair or replace the
defective part(s), free of any charge.
Second Through Fifth Year Warranty: Jon-Don further warrants that for a period of ve (5) years, the
condenser, evaporator, and compressor of the Ultimate 340 dehumidier will operate free of any defects
in material or workmanship, or Jon-Don, at its option, will repair or replace the defective part(s), provided
that all labor and transportation charges for the part(s) shall be borne by the end-user.
End-User Responsibilities: Warranty service must be performed by a Servicer authorized by Jon-Don. If
the end-user is unable to locate or obtain warranty service from an authorized Servicer, he should call
Jon-Don at the above number and ask for the Jon-Don Service Department., which will then arrange for
covered warranty service. Warranty service will be performed during normal working hours.
The end-user must present proof of purchase (lease) upon request, by reasonable and reliable means.
The end-user is responsible for normal care. This warranty does not cover any defect, malfunction,
etc. resulting from misuse, abuse, lack of normal care, corrosion, freezing, tampering, modication,
unauthorized or improper repair or installation, accident, acts of nature or any other cause beyond Jon-
Don’ reasonable control.
Limitations and Exclusions: If any Ultimate 340 Dehumidier part is repaired or replaced, the new part
shall be warranted for only the remainder of the original warranty period applicable thereto (but all
warranty periods will be extended by the period of time, if any, that the Ultimate 340 Dehumidier is out
of service while awaiting covered warranty service).
UPON THE EXPIRATION OF THE WRITTEN WARRANTY APPLICABLE TO THE Ultimate 340 DEHUMIDIFIER
OR ANY PART THEREOF, ALL OTHER WARRANTIES IMPLIED BY LAW, INCLUDING MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE, SHALL ALSO EXPIRE. ALL WARRANTIES MADE BY Jon-Don ARE
SET FORTH HEREIN, AND NO CLAIM MAY BE MADE AGAINST Jon-Don BASED ON ANY ORAL WARRANTY.
IN NO EVENT SHALL Jon-Don, IN CONNECTION WITH THE SALE, INSTALLATION, USE, REPAIR OR
REPLACEMENT OF ANY Ultimate 340 DEHUMIDIFIER OR PART THEREOF BE LIABLE UNDER ANY LEGAL
THEORY FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES INCLUDING WITHOUT LIMITATION
WATER DAMAGE (THE END-USER SHOULD TAKE PRECAUTIONS AGAINST SAME), LOST PROFITS, DELAY,
OR LOSS OF USE OR DAMAGE TO ANY REAL OR PERSONAL PROPERTY.
Some states do not allow limitations on how long an implied warranty lasts, and some do not allow the
exclusion or limitation of incidental or consequential damages, so one or both of these limitation may not
apply to you.
Legal Rights: This warranty gives you specic legal rights, and you may also have other rights which vary
from state to state.
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